<template>
  <div class="list" ref="wrapper">
    <div>
    <div class="area">
      <div class="title border-topbottom">当前城市</div>
      <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
    </div>
    <div class="area">
      <div class="title border-topbottom">热门城市</div>
      <div class="button-list">
          <div
          class="button-wrapper"
          v-for="item of hot"
          :key="item.id"
          @click="handleCityClick(item.name)"
          >
            <div class="button">{{item.name}}</div>
          </div>
        </div>
    </div>
    <div
    class="area"
    v-for="(city,key) in cities"
    :key="key"
    :ref="key"
    >
      <div class="title border-topbottom">{{key}}</div>
         <ul class="item-list">
           <li class="item border-bottom"
           v-for="itemcity in city"
           :key="itemcity.id"
           @click="handleCityClick(itemcity.name)">
           {{itemcity.name}}
           </li>
         </ul>
    </div>
  </div>
</div>
</template>

<script>
  import BScroll from 'better-scroll'
  import { mapState, mapMutations } from 'vuex'
  export default{
    name:'CityList',
    props:{
      hot:Array,
      cities:Object,
      letter:String,
    },
    computed:{
      ...mapState({
        currentCity: 'city'
      })
    },
    methods:{
      handleCityClick (city) {
        //this.$store.dispatch('changeCity',city) //调用changecity
        this.changeCity(city)
        this.$router.push('/')
      },
      ...mapMutations(['changeCity'])
    },
    mounted(){
      this.scroll = new BScroll(this.$refs.wrapper)
    },
    watch:{
      letter () {
        if(this.letter){
          const element = this.$refs[this.letter][0]
          this.scroll.scrollToElement(element)

        }
      }
    },
  }
</script>

<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .border-topbottom
      &:before
       border-color:#c#CCCCCC
      &:after
       border-color :#CCCCCC
    .border-bottom
      &:before
       border-color:#c#CCCCCC
    .list
      overflow :hidden
      position :absolute
      top :1.58rem
      left :0
      right :0
      bottom :0
      .title
        line-height :.54rem
        background :#EEEEEE
        padding-left :.2rem
        color :#666666
        font-size :.26rem
      .button-list
        overflow :hidden
        padding :.1rem .6rem .1rem .1rem
        .button-wrapper
          width :33.33%
          float :left
          .button
            margin :.1rem
            text-align :center
            border : .02rem solid #CCCCCC
            border-radius :.08rem
            padding :.1rem 0
      .item-list
      .item
        line-height :.70rem
        color :#666666
        padding-left :.2rem

</style>
